Apparatus for tanning



(No Model.) 2 SheetsSheet 1.

- J. DAVIS.

APPARATUS FORTANNING. No. 497,961. Paimntad May 23, 1893.

WITNESSES 11w 1J2;

2 Sheets-Sheet 2.

(No Model.)

J DAVIS APPARATUS FOR TANNING.

Patented May 23, 1893.

Darren Sterne ATENT Denice.

JOHN DAVIS, OF ALLEGHENY, PENNSYLVANIA.

APPARATUS FOR TANNING.

SPECIFICATION forming part of Letters Patent No. 497,951, dated May 23,1893.

Application filed July 23, 1889. Renewed November 7, 1891- Serial No,411,128. (No model.)

To all whom it may concern:

Be it known that I, JOHN DAVIS, a citizen of the United 'States,residing at Allegheny, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inApparatus for Tanning Hides; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention relates to tanning hides and has for its object certainimprovements in apparatus therefor.

Theinvention will be hereinafter described and particularly pointed outin the claims.

In the accompanying drawings which form part of this specification:Figure 1, represents a side elevation, partly in section; Fig. 2, an endview, and Fig. 3 a perspective of a bracket for supporting and clampingthe supply pipe.

Reference being had to the drawings and the letters thereon, A,indicates a revoluble vat, within which hides are suspended in anyapproved manner, and is provided at each end with a hollow trunnion B,0, supported upon pedestals a, I), having removable caps c, d. A pipe D,terminating in an open upturned end e, just above the horizontal centerof the vat, passes through the trunnion G, and its outer end (1, isprovided with a screen to prevent any foreign matter from being drawninto the vat. The pipe D is provided with a valve 6, for cutting offcommunication with the atmosphere, and with a branch f, communicatingwith a pump E for supplying tan liquor from the junk F of a leaching vatG. The branch f is provided with a valve 9 for cutting off communicationwith the pump E. At the opposite end of the vat A, is a pipe I-I,passing through the trunnion B, and having an upturned end h, a valve'i, a branch is, communicating with a pump 1, and provided with a valveZ. The outer end of the pipe H communicates with a section of hose m, bya detachable coupling a, for returning a portion of the tan liquor tothe leaching vat G, or the liquor may be transferred to another vatcontaining hides. The

pipes D, and H are supported in brackets K,

L, and are prevented from revolving by means of a screw 0, which drawsthe spring arms p, p, of the bracket together and clamps the pipe sothat it cannot revolve.

The vat A is made of any suitable material, and is composed of fourarc-shaped sides q, r, s, and t, curved transversely, and flat heads u,o, and of sufficient strength for the purpose of tanning in vacuum. Thisform of the vat possesses two important advantages; first, itaccommodates large hides which may be suspended longitudinally ortransversely in the vat with very little loss of space, or doubling, orfolding of the skins attheir ends; second, it prevents collapse of thevat when the air is exhausted therefrom, as each side braces its twoadjacent sides by forming a cord thereto.

The vat A is provided with a suitable manhole and cover 10, and a cockas to which a section of hose y is detachably secured by a coupling afor drawing ofi the tan liquor and returning it to the leaching vat.

The trunnions B, O, are each provided with a stuffing box and a gland attheir outer ends to prevent the leakage of tan liquor around the pipes Dand H; and the air drawn from the vat is discharged through suitablevalves (not shown) for the purpose, in the pump.

The vat may be revolved by a chain (not shown) engaging with a sprocketwheel M secured to the vat the couplings n and zhaving been previouslydetached.

WVhen the vat is being filled with tan liquor the valves in the airsupply pipes must be closed, and when air is being exhausted from thevat or vats all communication with the pump E and the atmosphere must beout 01f, except the discharge passage in the pump I.

I do not herein claim the several appliances and connections forsupplying tan liquor and air, and exhausting the air from the vatexcepting as specified in the claims.

Having thus fully described my invention, trunnions, and suitable meansfor supplying to what I claim is tan liquor and air, substantially asdescribed.

1. A tanning vat having four are shaped In testimony whereof Iattix mysignature in sides curved transversely, and flat heads, subpresence oftwo witnesses.

5 stantially as and for the purpose set forth.

2. A tanning vat having four are shaped JOHN DAVIS sides curvedtransversely, and flat heads, in Witnesses: combination with hollowtrunnions secured ADOLPHE H. BGOKING, to said heads, pipes extendingthrough the G. EISENBEIS.

